Improvement in crow-bars



T. H. SPURR W. UPTON. CROWBARS.

No. 195,412, Patented Sept.18,1877.

UNITED STATES PATENT OFFICE.

THOMAS H. SPURR AND WILLIAM UPTON, OF PHILADELPHIA, PA.; SAID UPTONASSIGNOR TO SAID SPURR. i

IMPROVEMENT IN CROW-BARS.

Specification forming part of Letters Patent N o. 195,412, datedSeptember 18, 1877 application filed March 7, 1877.

To all whom it may concern:

Be it known lthat we, THOMAS H. SPUER and WILLIAM UPTON, ofPhiladelphia., Pennsylvania, have invented a new and useful Improvementin Crow-Bars, of which the following is a specification:

The object of our invention is to construct a crow-bar for raisingrails, tearing up flooring, boards, &c.an object which we attain in thefollowing manner, reference being had to the accompanying drawing, inwhich- Figure 1 is a perspective view'of our improved crow-bar Figs. 2and 3, sectional views, showing the crowbar applied to the purpose oftearing ooringboards from joists; and Fig. 4 a plan View.

'lhe stem or handle A of the crow-bar is enlarged at the lower end, andis forked, so as to present two arms, c a., arranged at an angle inrespect to the stem, as best observe in Figs. 2 and 3.

In applying this implement to the tearing up of flooring-boards, towhich it is especially adapted, that part of the stem A at the base ofand between the arms a a rests uponthe top of a joist adjacent to theflooring-boards, the arms a a projecting down on each side of the joist,as shown in Fig. 2.

Upon drawing the stem A in the direction of the arrow the bar will turnupon the point a: as a fulcrum, the arms c a moving upward, and bearingagainst the under side of the boards of the flooring, and lifting themfrom lthe joist, as shown in Fig. 3.

It will be evident that, by simultaneously applying pressure to theboards on both sides of the joist, they can be lifted with much lesseffort, and the nails drawn from the joist more directly, than when acrowbar of the usual form is employed.

It will also be seen that, owing to the form of the arms a a of thecrow-bar, the angle assumed by the boards during the lifting operationis such a gradual one that there is no danger oi' breaking the tonguedor grooved edges of the boards.

When our improved crow-bar is applied to the raising of railroad-railsthe fulcrum .c rests upon the cross-tie, and the arms a a act upon therail on opposite sides of the said tie.

In the drawing the bar has an abrupt corner at the fulcrum; but it maybe rounded at this point.

We claim as our invention- The within-described crow-bar, bent andforked at the lower end, and adapted to be used as set forth.

In testimony whereof we have signed our names to this specicatiou in thepresence of two subscribing witnesses.

THOMAS H. SPURR. WILLIAM UPTON.

Witnesses:

JOHN K. RUPEETUs, .HARRY SMITH.

